Leg : 64 Top/Bottom Interval(mm): 0/ 750 Analyst: Fornari, D. Hole: 475 Sample Midpoint (m) : 158.75 Core: 18 Top of Core Depth (m) : 158.00 Sect: 1 Top of Section Depth(m): 158.00 LITHOLOGY: POLYGENETIC BOULDER TO COBBLE CONGLOMERATE; Piece No. : PCE 1 (0-5), 2 (7-10), 3 (12-15), 4 (17-21), 5 (18-23), 6 (29-35), 7 (37-41), 8 (42-50), 9 (52-58), 10 (60-63), 11 (64-75); Comments : PCE 1: METAVOLCANICS,FINE-GRAINED, LIGHT MED. GRAY, THIN SUB-PARALLEL QUARTZ-FILLED FRACTURES (<1MM), ORTHOGONAL JOINT PATTERN; PCE 2: METAQUARTZITE, LIGHT BEIGE; PCE 3 & 4: LOW-GRADE QUARTZ SANDSTONE, COARSE- GRAINED, 1-2MM, PEPPERED-GREEN; PCE 5: METAVOLCANIC, GREENISH-GRAY; PCES 6 & 7 & 8 & 11: METAMORPHOSED GRAIN-SUPPORTED CONGLOMERATE,LARGE FRACTURED CLASTS OF FELDSPAR, QUARTZ, VOLCANICS AND LATH-SHAPED CLASTS TO 1 CM, REDDISH HUE; PCES 9 & 10: COARSER-GRAINED THAN PCES 3 & 4, APPEARS TO BE METAMORPHOSED MEDIUM-GRAINED, POORLY SORTED GRAYWACKES; Leg : 64 Top/Bottom Interval(mm): 0/ 470 Analyst: Fornari, D. Hole: 475 Sample Midpoint (m) : 167.97 Core: 19 Top of Core Depth (m) : 167.50 Sect: 1 Top of Section Depth(m): 167.50 LITHOLOGY: POLYGENETIC BOULDER TO COBBLE CONGLOMERATE; COBBLES VARY FROM METAVOLCANIC TO METASEDIMENTARY ROCK OF MEDIUM-GRADE METAMORPHISM; Piece No. : PCES 1 (0-4), 2 (7-10), 3 (12-17), 4 (19-21), 5 (22-27), 6A & 6B (28-30), 7 (32-35), 8 (37-41), 9 (42-47); Comments : PCE 1: METAGRAYWACKE SIMILAR TO PCES 3 AND 4 IN CORE 18-1; PCE 2: GRAYISH-ORANGE PINK (5YR 7/2), SUBROUNDED COBBLE WITH QUARTZ AND FELDSPAR CRYSTALS RANDOMLY SET IN THE PINKISH,FINE-GRAINED MATRIX; PCE 3: STRONGLY BANDED PINKISH GRAY TO GRAY-BLUE BANDS, POSSIBLY AN IGNIMBRITE; PCE 4: SMALL PEBBLE SIMILAR TO PCE 1; PCE 5: LIGHT GRAY METAVOLCANIC?; PCES 6A AND 6B: SMALL,MODERATE BROWN (5YR 3/4) PURPLISH PEBBLE; PCE 7: PALE RED (10R 6/2) COBBLE WITH LIGHT COLORED INCLUSIONS (NOT CRYSTALS); PCE 8: COARSE-GRAINED ROCK,GRAYISH, COMPOSED OF SUBROUNDED ROCK CLASTS (2-5MM) CRUDELY ALIGNED AT TIMES; PCE 9: GRAYISH-PALE RED (10R 6/2),FINE-GRAINED ROCK WITH FELDSPAR CLASTS,SUBHEDRAL TO ANHEDRAL, SET IN GRAYISH-PINKISH FINE MATRIX WITH BIOTITE FLAKES IN A IN A CRUDE, POORLY-DEFINED PARALLEL ALIGNMENT; Leg : 64 Top/Bottom Interval(mm): 0/ 820 Analyst: Fornari, D. Hole: 475 Sample Midpoint (m) : 177.82 Core: 20 Top of Core Depth (m) : 177.00 Sect: 1 Top of Section Depth(m): 177.00 LITHOLOGY: COBBLES TO PEBBLES OF VOLCANIC-SEDIMENTARY ROCK SHOWING LOW TO MEDIUM GRADE METAMORPHISM; Piece No. : PCE 1 (0-9), 2 (10-18), 3 (20-22), 4 (23-26), 5 (28-32), 6 (34-37), 7 (38-43), 8 (45-51), 9 (54-60), 10 (64-68), 11 (70-74), 12 (75-82); Comments : PCE 1: SEVERAL PEBBLE FRAGMENTS: ONE SHOWS BOUDINAGE AND FRACTURED CLASTS ALIGNED IN CRUDE BEDDING; PCE 2: POLYGENETIC CONGLOMERATE SIMILAR TO PCES 3 AND 4 IN CORE 18-1 AND PCE 1 IN CORE 19-1; PCE 3: DARK GRAY WITH WHITE INCLUSIONS; PCE 4: PINK PEBBLES SIMILAR TO CORE 18-1,PCES 6,7,8 AND 11 (RHYOLITE); PCES 5 & 6: DENSE GRAYISH OLIVE GREEN (5GY 3/2) ROUNDED COBBLES WITH PINK VEINS; PCE 7: METACONGLOMERATE; PCE 8: IGNIMBRITE,RHYOLITIC; PCE 9: FINE-GRAINED,VOLCANIC ROCK,VERY DUSKY RED (10R 2/2) WITH GREEN SPECKS; PCES 10 & 11: PINKISH,POORLY SORTED,VOLCANIC WITH GREEN SPECKS; PCE 12: GRAYISH-BLUE METAGRAYWACKE(?) BIMODAL SORTING, FELDSPAR AND QUARTZ CLASTS; Leg : 64 Top/Bottom Interval(mm): 0/ 800 Analyst: Fornari, D. Hole: 475 Sample Midpoint (m) : 187.30 Core: 21 Top of Core Depth (m) : 186.50 Sect: 1 Top of Section Depth(m): 186.50 LITHOLOGY: COBBLES OF VOLCANIC-METAMORPHIC-SEDIMENTARY ROCK; Piece No. : PCE 1 (0-10), 2 (13-15), 3 (12-14), 4 (20-22), 5 (23-27), 6 (30-33), 7 (35-40), 8 (42-44), 9 (47-50), 10 (53-55), 11 (56-59), 12 (62-65), 13 (67-70), 14 (72-75), 15 (77-79); Comments : PCE 1: 1-2MM GRAIN-SIZED SILICA-CEMENTED GRAYWACKE, GRAINS INCLUDE QUARTZ, FELDSPAR AND LITHIC FRAGMENTS, NARROW CALCITE BAND; PCE 2: PURPLISH COLORED FELDSPATHIC TUFF(?) WITH EQUAL PROPORTIONS OF CLASTS AND APHANITIC GROUNDMASS; PCE 3: VERY FINE-GRAINED LIGHT YELLOW (5YR 5/2) RHYOLITE WITH ORANGE 1.0-1.5MM YELLOW PHENOCRYSTS; PCE 4: SAME AS PCE 1; PCE 5: VERY COARSE POLYMICTIC BRECCIA, WITH QUARTZ (UP TO 5MM) AND LITHIC FRAGMENTS (UP TO 2CM) IN A SILICEOUS BROWN GROUNDMASS; PCE 6: COARSE POLYMICTIC CONGLOMERATE, LARGE QUARTZITE PEBBLES (>0.5MM) IN SILICEOUS MATRIX; PCE 7: 0.5-4.0 MM GRAIN-SIZED SILICA-CEMENTED GRAYWACKE WITH QUARTZ-RICH BANDS, SOME LITHIC FRAGMENTS; PCE 8: ?MEDIUM-GRAINED METASEDIMENT?; PCE 9: ?SILICEOUS VEIN MATERIAL; PCE 10: SIMILAR TO PCE 2; PCE 11: FINE-GRAINED DARK GRAY QUARTZITIC SANDSTONE; PCE 12: FINE-GRAINED GRAYWACKE (?) OR POORLY SORTED SANDSTONE WITH FOLIATION (PROBABLY DEPOSITIONAL) SHOWN BY BIOTITE; PCE 13: MEDIUM-GRAINED PALE GRAY QUARTZITIC SANDSTONE; PCE 14: POLYMICTIC CONGLOMERATE CONTAINING 0.2-3MM CLASTS OF QUARTZITE AND PELITES; |
Cite as: Deep Sea Drilling Project (1989): Archive of Core and Site/Hole Data and Photographs from the Deep Sea Drilling Project (DSDP). National Geophysical Data Center, NOAA. doi:10.7289/V54M92G2 [access date]
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